It can explore the comical aspect as well. Imagine drunk Sasuke trying to show off some ninja moves to Sakura but failing miserably because of his inebriated state. Sakura, being sober, finds it both funny and endearing. This could be a way to break the ice between them and lead to a more affectionate relationship in the fanfic.
A possible plot could be that Sasuke gets drunk at a party or some gathering. Sakura, being sober, is initially annoyed but then realizes that this is a chance to get closer to him. She tries to make him comfortable and in the process, they share some light - hearted moments that are a departure from their usual tense relationship.
It can show how Sasuke's possessiveness affects Sakura's independence. For example, if he's too possessive, Sakura might start to feel suffocated. Or it could explore how Sasuke's possessiveness is a sign of his deep love for her. Maybe he's possessive because he's afraid of losing her after all they've been through.
The relationship could start with Sasuke being secretly jealous of Sakura's closeness to someone else. He might not show it at first, but little actions would give it away. For instance, he might glare at the other person when they are around Sakura. Sakura, being perceptive, could start to suspect something. This would create an interesting dynamic as she tries to figure out what's wrong with Sasuke.
Their relationship can be shown as one filled with deep love and care. Sasuke, who has always been a bit aloof, becomes much more tender and attentive towards Sakura during her pregnancy. He might start doing small things like getting her favorite foods or just sitting with her and talking about their future as a family.
The relationship can also be developed through their interactions with other characters. For instance, if they have a child, how they both interact with the child and how their parenting styles differ and blend. Also, how they interact with their friends like Naruto and Hinata. Maybe they have double dates or group outings. All these interactions can show different aspects of their relationship and how it grows and evolves over time.
At first, Sasuke might start with small gestures. For instance, he could be more attentive to Sakura's presence, like looking at her more often or listening more closely when she speaks. This could gradually lead to more direct interactions, such as him starting conversations with her instead of the other way around.
Traveling gives them a chance to be away from the normal distractions of their home. They can have long conversations while on the road or during breaks. Sasuke could share his dreams of a peaceful future for the ninja world, and Sakura could talk about her hopes for the medical advancements in their village. As they communicate more, they start to understand each other better. And as they face difficulties together, like bad weather or bandit attacks, they rely on each other more, which gradually turns into a deeper love.
The forest is a place full of mystery and danger. This forces Sasuke and Sakura to be close to each other physically and emotionally. They have to trust each other more as they face the unknowns in the forest, like strange creatures or difficult terrains.
In a college - set fanfic, their relationship could develop through study groups. For example, if they are both in a difficult class like advanced calculus. They start off as just classmates in the study group, but as they spend more time together, they notice each other's strengths and weaknesses. Sasuke might admire Sakura's patience when explaining concepts to others, and Sakura could be drawn to Sasuke's determination to master the subject. This mutual respect could turn into something more romantic over time.
It could make their relationship stronger in the long run. After the fight, they might realize how much they actually care about each other. They could start to communicate better and understand each other's perspectives more deeply.